Concentric pipe systems and methods

A concentric valve positionable in a wellbore, comprising:

• a valve body comprising an outer surface and a central passage, a receptacle disposed in the central passage and defining a chamber disposed therein, and a radial port extending between the receptacle and the outer surface to provide fluid communication between the chamber of the receptacle and an environment surrounding the concentric valve;
• an inner tubular member slidingly received in the receptacle of the valve body whereby an outer surface of the inner tubular member is unattached from an inner surface of the receptacle, wherein the inner tubular member comprises an internal fluid passage and a seal assembly configured to sealingly engage an inner surface of the receptacle;
• and
• a piston slidably disposed in the receptacle of the valve body, wherein the piston comprises a first position providing for fluid communication between the chamber of the valve body and the surrounding environment, and a second position restricting fluid communication between the surrounding environment and the chamber.

A concentric valve positionable in a wellbore, comprising:

• a valve body comprising an outer surface and a central passage, a receptacle disposed in the central passage and defining a chamber disposed therein, and a radial port extending between the receptacle and the outer surface to provide fluid communication between the chamber of the receptacle and an environment surrounding the concentric valve;
• an inner tubular member received in the receptacle of the valve body, wherein the inner tubular member comprises an internal fluid passage and a seal assembly configured to sealingly engage an inner surface of the receptacle;
• and
• a plurality of circumferentially spaced bypass passages extending around the receptacle of the valve body and each circumferentially spaced from the radial port, wherein the bypass passage provides fluid communication between a first end of the central passage and a second end of the central passage opposite the first end.